Macrumors reported that hacker group Antisec has released a dump of 1 million unique identifiers (UDIDs) from Apple iOS devices tonight. They say that the records came from a file found on an FBI laptop back in March. The file found on this laptop contained over 12 million device records, including Apple UDIDs, usernames, push notification tokens, and in some instances, names, cell phone numbers, addresses and zip codes.

After removing most of the personal information, the hackers released 1 million of these records including Apple UDIDs, APNS (push notification) Tokens, Device Name (e.g. “Arnold’s iPhone”) and Device Type (e.g. “iPhone”).

During the second week of March 2012, a Dell Vostro notebook, used by Supervisor Special Agent Christopher K. Stangl from FBI Regional Cyber Action Team and New York FBI Office Evidence Response Team was breached using the AtomicReferenceArray vulnerability on Java, during the shell session some files were downloaded from his Desktop folder one of them with the name of “NCFTA_iOS_devices_intel.csv” turned to be a list of 12,367,232 Apple iOS devices including Unique Device Identifiers (UDID), user names, name of device, type of device, Apple Push Notification Service tokens, zipcodes, cellphone numbers, addresses, etc. the personal details fields referring to people appears many times empty leaving the whole list incompleted on many parts. no other file on the same folder makes mention about this list or its purpose.

Why the FBI got these records or how the Hackers stole this information is not entirely clear, however this kind of information is normally what an iOS app developer would collect to deliver push notifications to users.